Related Questions

Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are
A Carbonates
B Sulphates
C Silicates & phosphates
D Bi-carbonates
Which of the following is not used as a surface active agent in a flocculation operation?
A Sodium silicate
B Quartz
C Lime
D Alumina
Pick out the correct combination about the role of various additives used in polymers.
A Plasticiser : increases the polymer strength
B Heat stabiliser : increases the maximum service temperature
C Fillers: Does not affect the property of polymer but increases its weight
D Lubricants: increases the flexibility of polymers
Many food additives cause cancer
A added substances
B dangerous substances
C natural substances
D additional substances
Many food additives cause cancer.
A natural substances
B dangerous substances
C added substances
D additional substances .
Many food ‘additives’ cause cancer.
A natural substances
B dangerous substances
C added substances
D additional substances
Which of the following additives improves the cetane number of diesel?
A Amyl nitrate
B Ethyl mercaptan
C Napthenic acid
D Tetra ethyl lead
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?
A Xanthates
B Stearic acid
C Calcium & aluminium stearate
D Formic acid
Waxy crudes are treated with chemical additives mainly to
A Depress its pour point
B Dissolve wax
C Precipitate wax
D Remove wax
Which of the following additives are added to plastics to make it impervious to X-rays?
A Asbestos
B Barium salt
C Carborundum
D Phthalic acid

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